Coke and like screening machine



Sept. 30, 1952 F. J. was-r ET AL coxs AND LIKE scaamuua MACHINE med April "19 1949 Patented Sept. 30, 1952 l This invention relates to coke and like screening machines and has for its object toprov'ide an improved construction and arrangement "of machine whichisefficient in operation'and separates the biggest sizes firstwith the remaining separated in the descending order of size which reduces breakage of material to aminir'num'and also power consumption andfvibrationfi .T I 'he invention consists in a cokei 'or lik'e scr eening machine comprising a travelling endless belt acrossgwhich are arranged at intervals jgr'ille's or screens disposed at an angle to the direction of travel of-the belt so as to direct the. material which will not pass through any particular grille or screento the si-de'of the beltat which delivery is to take place.

The bottom of each screen or grille comes close to thdbeltsdrfac. Each screen-or grille may consist or vertical rods or bars'asfshown in"Fi'ge3i r of r ers-1f re l lvi u -v rtica rodsior bars asis'hown in Figure 4. "The s acin of the pars, rods or rollers constitutingi-the screen'sor'grillesis' such as to separate at: each screen; or grille the material of aparticulan size; The largest material is scalpedand discharged firstand this may constitute the major portion of the material upon the-belt. In this waiythe breakag es whic-h'o'ccur due" to therolling about [Thefinvention further comprises nieahsjfbtweenthe grilles or screens which cause the material which passes through ajjgrille or screen to travel towards the side of the belt opposite to that at which delivery ofthe' 'separated material ismade -so-that when such materialfreaches the next grille or screen it-"willjtravel across the face thereof to ensure efficient screening."""'

The invention further consists :in forming each grille or screen of vertical rods, bars or rollers (thebottorns of whiclr'come close tether-belt surface) spaced to effect the desired separations. The'invention further consists in the provision of means for imparting a vibratory movement to each screen to assist in the screening operation.

The invention further consists in delivering the material on to the belt at one side thereof so that it tends to travel across the first grille or screen to the opposite side of the belt where the first discharge of separated material occurs.

Referring to the accompanying explanatory drawings Figure l is an elevation, Figure 2 a plan view and Figure 3 a sectional view on the line 3-3 of Figure 1 showing a screening machine constructed in one convenient form in accordance with this invention.

Figure 4 is a detail view of part of one form of grille or screen.

The material to be screened is delivered at a to one side of the travelling belt b, across which are arranged at intervals the screens or grilles of the material-"as it passes *throughffusual screening machines is-avoided' and powercon sumption reduced Between th'efi-successive screens or grille's ar'e arranged deflectors g whichcause the material which passes; through a grille onscreen toftr'avel towards the side of the'belt opposite to thatat which the shutes or hoppers-e are situated "-sa th'atwhen such material reaches the next grille x or screen it will'tr'avel across'the race thereof to a the grille'or screen;

ensure efiicientscreening. v e 'E'a'ch grille or screen may be: given a vibratory movement by an electric-vibrator h attached to "'At' the-"offside; a backplate i'is provided prevent material fallingofi the belt. I

The beltb'is preferably supported by rollers beneath the belt-'where*-the grilles or screens-are situated and has tensioning means at k.

If desired there may be a pilot short and relatively broad belt upon which the bulk to be screened is delivered and upon which the largest size material is separated from the bulk. This may reduce the bulk by say 50%. After this preliminary separation, a narrower belt may be used for the further separations.

If desired the grilles or screens may be so set that they deliver alternately to opposite sides of the belt, which may be useful for distributing the different grades of material.

O-ur improved machine is simple in construction and not subject to the usual heavy wear and tear. It operates without vibration, which in present constructions of machine causes excessive wear and other troubles.

We claim:

1. A machine for screening coke and kindred materials comprising an endless conveyor movable in a horizontal plane, a plurality of spaced apart substantially vertical grills supported a slight distance above the conveyor with the grills extending transversely of the conveyor at an angle to the direction of travel of the conveyor, the openings of the grills diminishing in size in the direction of travel of the conveyor whereposite to that of the said grills. andterminating; short of the means defining the stop memberand the next grill constituting a restricted opening whereby the particles passing through the grill are moved by the deflector through-therastricted opening toward the end of the next grill remote j from the delivery side of the conveyor so that the particles striking the next. grill will travel the entire length of" thelsaiddgrillffor proper separation p 25A machine for screening coke and kindred materials comprising] a substantiallylhorizontal. endless belt, means for supporting and driving the belt, means to admit, material 11m ,the belt at one side thereof in proximity to th'ebeginning ot-the upper stretch of the belt, a plurality of spaced apart substantially vertical screens supported a slight distance above the upper stretch of the belt with the screens extending, transversely .of the upper stretch at an angle to the direction of travel of the conveyor, the mesh size of the screens diminishing inthe directionof travel of the conveyor whereby each screen. will delivermaterial of greater particle size than the openings therein ,ofi one side ofthe conveyor while the material of proper particle. size' passes therethrough toward the next screen, a. receiver along the delivery'side of the conveyor for each screen for the collection .of materialdelivered oil the conveyor by the screen, a stop member along-the side of the conveyor opposite to the delivery side of the conveyor extending above the upper stretch of the conveyor and a:defiector supported above-and havinga running clearance with the upper stretch of the conveyor'intermediate adjacentscreens and extending angularly transversely of the u-pper- :Stretch of the I each includes ar-plurality of spaced vertical bars bar.

conveyor in a direction opposite to that of the said screens and terminating short of the stop member and the next screen to constitute a restrictedopening, whereby the material passing through the screen is. moved by the"; deflector through the restricted opening toward the end of the next screen remote from the delivery side of the conveyor so that the material striking thenext screen will travel the entire length of the. said screen for proper separation.

vB'rA machine .asdefined in and claimed by 1 further characterized in that said grills and a roller carried by the lower end of each FREDERICK JOSEPH WEST. ERNEST WEST.

7 REFERENCES CITED. h

The]followingsreferences are oi recordinthe: file ofJthis' patent:- v ,7 1

1 i V s rn rEs PA rENTs Number Name Date "32,017 Turneret' a1; 1". Apr. 9,1851 183,660 Geohe'g'an Oct. 24,' 1816' 468,197 7 Gilbert Feb,.21.1892

. 475,568 Jewett' May 24,1892 551,772 King Dee/24,1895 663L212 Vea'rgeon Dec. 4,19100 1,039,206 Stanley t Sept; 24,,19'1'2 1,237,315 Ebv et a1.. .c -:}Aug- 21}.l9fl 1323145. Allatt 'Nov..25,ji919 1,555,704 Rhodes Sept. 29,1925 1,610,716 Stebbins ,Dec. 14,1926 1,696,554 Phelps. Dec. I25, 1928. 1,906,331 1 Phelps May-2,1933 2,2311066 Greene et .al. Feb, 11, 194L 223 435 Christian Feb; 111,. .1941- 2,238,454 Stele'et at. -v Apr, 15,1941- 2,276333 'Ovestr'ud he--- 17-, 1942- 2,406,842 ,Luptcnrnnlwlnhi S ept-. 3, 194s- FOREIGN:- ramnnrs:

Number Country. Date 91,303 Sweden 0211525, 1933.

307,852 Great Britain "Mar; 14,1929 

